Driving mechanism for grinding-machines.



, C. I. BOE. DRIVING MEcHANlsm F011 QRINDING' MACHINES. APPLICATION FILED FEB. 3. I9I7 1,235,182. Patented my 31,1917.

2 SHEETS-SHEET I.

I Bmw C. l. BOE.A DRlVlNG MECHANISM FOR GRINDING MACHINES.

APPLICATION FILED FEB. 3. 1.911.

Patented July 31, 1917.

2 SHEETS-SHEET 2 3mm -emfac/ CLARENCE I. BOE, 0F THOMPSON, NORTH DAKOTA.

DRIVING MECHANISM FOR GRINDING-MACHINES.

Specification of Letters Patent.

Patented July 31, 1917.

Application filed February 3, 1917. Serial No. 146,445.

To all whom t may concern:

Be it known that I, CLARENCE I. BOE, a citizen of the United States, residing at Thompson, in the county of Grand Forks and State of North Dakota, have invented certain new and useful Improvements in Driving Mechanism for Grinding-Machines, of which the following is a specification.

This invention relates to devices for operating a grindstone and for similar purposes, and has for one of its objects to provide a device of this character which is compact in arrangement and can be readily transported from place to place, and covered and protected when not in* use.

Another object of the invention is to provide a simply constructed device which may be readily employed for actuating grinding wheels of various forms and of various compositions, and in which various forms and shapes for grinding or abrading may be interchangeably employed and arranged in operative position.

With these and other objects in view, the invention consists in certain novel features of construction, as hereinafter shown and described and then specifically pointed out in the claims; and in the drawings illustrative of the preferred embodiment of the invention- Figure 1 is a side elevation of the improved device with the inclosure and cover in longitudinal section.

Fig. 2 is a transverse section on the line 2 2 of Fig. 1, looking in the direction of the arrow.

Fig. 3 is a detail perspective view of the controlling lever illustrating the manner of locking theV same in position.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The improved device includes a casing or shell 10 having a cover 11 hingedly attached thereto at 12, and which comprises a support for the operating and grinding mechanism, the operating mechanism being attached to the lower face of the member 11 and disposed normally within the shell 10, while the supports for the grinding or abrading mechanism are supported upon the outer face of the member 11.

Depending from the lower face of the member 11 is a bracket 13 having a bearing` 14, and likewise suspended beneath the lower face of the member 11 is a motor device, in the present instance an electric motor of approved form and represented as a whole at 15. The shaft of the motor 15 is represente-:l at 16. The motor includes a bracket portion 17 which is attached by binding bolts 1S to the member 11. v Mounted for rotation in the bearing 14C and provided with a reduced portion operating in a suitable socket in the adjacent end of the motor shaft 16, is another shaft 19. Mounted upon the shaft 19 is a belt pulley 20, and rigidly connected to the shaft 16 of the motor is a clutch member 21. Slidably mounted upon the shaft 19 is another clutch member 22 adapted to coperate with the clutch member 21. The clutch member 22 is provided with a suitable channeled cOllar 23 and likewise provided with a key-way in constant slidable engagement with a feather key 24C. A spring 25 is located between the collar member 23 and the hub of the belt pinion 20, the spring operating to hold the clutch member 22 in yieldable engagement with the clutch member 21. By this means the clutch member 22 is slidably disposed relatively to the shaft 19, while at the Same time rotative therewith through the action of the feather key. Y

Depending from the underface of the member 11 is a bracket 26 to which a shipper lever 27 is pivotally united at 28, the shipper lever having a yoke device 29 with antifriction rollers engaging in the channeled collar 23 of the clutch member 22. By this means it will be obvious that when the lever 27 is moved in one direction the clutch member 22 will be moved longitudinally upon the shaft 19 against the tension of the spring 25 and thus disconnect the clutch members. The lever 27 extends through a suitable slot 'in the Vmember 11, shown at 30 in Fig. 3.

the slot having a stop 31with one inclined side and with which the lever arm 27 engages when in one position, to lock the lever and thus maintain the clutch member 22 out of engagement with the clutch member 21. The lever arm 27 is sufciently yieldable to permit it to' be deflected laterally when moved against the lock stop 31 and to spring behind the lock stop when released. By this means the clutch member 22 may be locked in open position or disconnected from the member 21. The clutch member 22 may be released by simply moving the lever arm 27 laterally until it is clear from the stop 31, when the reaction of the spring 25 will immediately again connect the clutch members.

Mounted upon the upper face of the member 11 are standards 40--41 having` bearings at their upper ends to receive a main driving shaft 42. The shaft 42 is provided with a belt pulley 43 over which a belt 44 runs from the belt pinion 20, the belt operating through a suitable slot in the member 11 and indicated at 45.

The shaft 42 extends at one end in advance of the bracket 41 and is adapted to receive a grinding member or wheel indicated as a whole at 46. The member 46 is detachably coupled to the shaft 42 by a binding nut 47, so that grinding devices of various forms may be attached to the shaft. F or the purpose of illustration the grinding member 46 is of the form usually employed for grinding mower or harvester sickle knives, but it will be understood that any form of grinding wheel or like device may be attached to the shaft 42.

By this arrangement it will be obvious that when motion is imparted to the motor 15, this motion will be communicated to the shaft 42 and the grinding devices when the clutch members 21-22 are united, as shown in Fig. 1. Bearing upon the upper face of the member 11 is a cover or shield 48 for the wheel 46 and its driving mechanism. The pintles of the hinges 12 are of sufficient length to receive the hinge members 49 of the cover 48, so that one set of hinges are utilized to swingingly connect both the member 11 and the cover 48 to the hollow base or receptacle 10. By this means when the device is not in use the grinding element and its operating mechanism may be covered and protected. A suitable catch device 50 is arranged to hold the cover 48 in fixed position relative to the member 10, and the member 48 is provided with a handle 51 to enable it to be carried from place to place. A. switch device is employed in connection with the motor 15 and comprises yieldable contacts 52 and a coupling arm 58, the latter pivoted at 54 to a base 55, the base being attached rigidly to the member 11 and insulated therefrom. The conductor wires, indicated conventionally at 56, lead from the motor 15 to the base 55 and to the arm 53 and the contacts 52. The member 53 is extended as shown at 56. and provided with a terminal bearing wheel 57 which is insulated in any suitable manner from the arm 56. The arm 534-56, isv arranged so that when the cover 48 is disposed in closed position, as shown in Fig. 2, the adjacent portion of the top will engage the wheel 57 and move the arm 53. into position to disconnect it from the contacts 52, and thus automatically cut out the motor. Thus if the operator neglects to out out; the motor when the device is to be disconnected or disposed in inoperative position, the operation of closing the cover will automatically cut out the motor. Mounted to swing at 58 from the lower face of the member 11 are slotted arms 59 each having a lateral off-set 60 at its free end.

Attached to the adjacent walls of the casing 10 are pins 61 operating continuously within the slots of the bars 59. By this arrangement it will be obvious that when the cover 48 is opened the bars 59 will move over the pins G1 by their slots, and when the off-sets 60 come opposite the pins G1 the arms 59 will fall by gravity and thus lock the cover from moving beyond a certain predetermined point and will also lock the cover in open position.

The improved device is simple in construction, compactly arranged, can be manufactured of any required size and employed for any purpose to which it is adapted.

The improved device will be found very useful for employment in connection with farm operations, and may be moved from place to place within the range of the conductor wires from the source of electric energ.

Having thus described the invention, what is claimed as new is- 1. In an apparatus of the class described, a receptacle, a support forming the top of the receptacle and hingedly united thereto, a lower bracket and an outer bracket bearing respectively upon the lower and outer faces of the support, fastening devices connecting said brackets through the support, a lower shaft mounted for rotation in the lower bracket, an upper shaft mounted for rotation in the outer bracket and adapted to have an abrading element attached thereto., means carried by the support for transmitting motion to the lower shaft, and means for transmitting the motion of the lower shaft to the upper shaft.

2. In an apparatus of the class described, a receptacle, a support forming the top of the receptacle and hingedly united thereto, a lower bracket bearing upon the lower face of the support, coperating outer brackets in spaced relation and bearing upon the outer face of the support, a motor device bearing upon the lower face of the, support, fastening devices operating through the support and connecting said lower bracket to one of the outer brackets, fastening devices operating through the support and connecting said motor devicer with the other of said outer brackets, an upper shaft mounted for rotation in the outer brackets and adapted to have an abrading element attached thereto, a lower shaft mounted for rotation in said lower bracket, means for transmitting the motion of said motor device to said lower shaft, and means for transmitting the 13o motion of said lower shaft to said upper shaft.

8. In an apparatus of the class described, a receptacle, a support forming the top of the receptacle and hingedly united thereto, a lower shaft supported for rotation from the under face of said support, an upper shaft mounted for rotation upon the outer face of the said support and adapted to have an abrading element* attached thereto, a cover for said support hinged to said receptacle, an electrically actuated motor attached to the under face of the support, means for transmittin the motion of said motor device to sai lower shafts, means for transmitting the motion of said lower shaft to said outer shaft, and a switch member mounted upon said support and associated with said motor device, said switch member extending into the path of the cover and adapted to be moved into open position by the cover when the same is closed.

In testimony whereof I aiiiX my signature.

CLARENCE r. BoE. [L 5.]

Copies of this patent may be obtained for ve cents each, by addressing the Gommissioner of Patents, Washington, D. C. 

